Uma análise comparativa entre Threads e Green Threads no Java.

Abstract

Green thread is a thread model in which scheduling is done by runtimes instead of the operating system. This approach requires fewer resources in terms of memory and CPU cycles than traditional thread designs. Recently, the Java language, in its version 19, introduced an implementation of Green threads called Virtual Threads. Because it is still not widely used, we know little about the efficiency of this implementation. In this work, we evaluated the performance of Java's green thread implementation. We compared the results of this implementation with the standard implementation already available in the language. At the end of this work, it was evident that Virtual Threads show a significant performance improvement compared to the conventional Threads approach in Java, being superior in all tests conducted. The results of this study highlighted the performance disparity between different thread handling approaches, with Virtual Threads showing exceptional performance compared to conventional threads in Java. It became clear that systems with a large number of threads can achieve significant performance improvements by implementing Virtual Threads in their structure.